What even is this thread? We know very, very little of PS5, including crucial things like release date, price, launch lineup, etc.
There is no way anyone could make any sort of argument, for or against this question, in good faith.
It's possible that Sony's hubris causes the PS5 to garner ill will to gamers and its their worst selling console. It's possible that it's a mega success and outsells the PS2. There's no way to argue in any sort of fashion with any sort of foundation that isn't pure (worthless) conjecture.